Boom

An SMBC comic. A teacher in glasses and a tie stands beside a small model volcano on a desk, gesturing as he lectures: "And when we add vinegar to baking soda, boom! Just like magma pressure inside a volcano!" Beside him a wide-eyed student with flame-like orange hair blurts in alarm: "And because of the lack of a condom you are all pregnant now." A caption beneath reads: "Due to budget cuts we were forced to merge Geology and Sex Ed." The joke: two unrelated classes have been combined, so the volcano demonstration collides absurdly with sex-ed material. Votey (aftercomic): a simple line-drawn figure with a queasy, defeated expression has a thought bubble saying, "Still better than last year's lunch/sex ed merger" — implying an even more disturbing previous combination.